FreeBSD 系统参数探测 cpu,内存_PHP教程

这是一款php的系统参数探测，他可以检测到freebsd cpu,内存，更新时间，运行时间等。

freebsd 系统参数探测 cpu,内存

/*
这是一款php教程的系统参数探测，他可以检测到FreeBSD cpu,内存，更新时间，运行时间等。
*/

//取得参数值 FreeBSD

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function get_key($keyName)
    {
        return do_command('sysctl', "-n $keyName");
    }
    

// 确定执行文件位置 FreeBSD

    function find_command($commandName)
    {
        $path = array('/bin', '/sbin', '/usr/bin', '/usr/sbin', '/usr/local/bin', '/usr/local/sbin');
        foreach($path as $p)
        {
            if (@is_executable("$p/$commandName")) return "$p/$commandName";
        }
        return false;
    }
 
 function sys_freebsd()
    {
        //CPU
        if (false === ($res['cpu']['num'] = get_key("hw.ncpu"))) return false;
        $res['cpu']['detail'] = get_key("hw.model");
        
        //LOAD AVG
        if (false === ($res['loadAvg'] = get_key("vm.loadavg"))) return false;
        $res['loadAvg'] = str_replace("{", "", $res['loadAvg']);
        $res['loadAvg'] = str_replace("}", "", $res['loadAvg']);
        
        //UPTIME
        if (false === ($buf = get_key("kern.boottime"))) return false;
        $buf = explode(' ', $buf);
        $sys_ticks = time() - intval($buf[3]);
        $min = $sys_ticks / 60;
        $hours = $min / 60;
        $days = floor($hours / 24);
        $hours = floor($hours - ($days * 24));
        $min = floor($min - ($days * 60 * 24) - ($hours * 60));
        if ($days !== 0) $res['uptime'] = $days."天";
        if ($hours !== 0) $res['uptime'] .= $hours."小时";
        $res['uptime'] .= $min."分钟";
        
        //MEMORY
        if (false === ($buf = get_key("hw.physmem"))) return false;
        $res['memTotal'] = round($buf/1024/1024, 2);
        $buf = explode("n", do_command("vmstat", ""));
        $buf = explode(" ", trim($buf[2]));
        
        $res['memFree'] = round($buf[5]/1024, 2);
        $res['memUsed'] = ($res['memTotal']-$res['memFree']);
        $res['memPercent'] = (floatval($res['memTotal'])!=0)?round($res['memUsed']/$res['memTotal']*100,2):0;
          
        $buf = explode("n", do_command("swapinfo", "-k"));
        $buf = $buf[1];
        preg_match_all("/([0-9]+)s+([0-9]+)s+([0-9]+)/", $buf, $bufArr);
        $res['swapTotal'] = round($bufArr[1][0]/1024, 2);
        $res['swapUsed'] = round($bufArr[2][0]/1024, 2);
        $res['swapFree'] = round($bufArr[3][0]/1024, 2);
        $res['swapPercent'] = (floatval($res['swapTotal'])!=0)?round($res['swapUsed']/$res['swapTotal']*100,2):0;
        
        return $res;
    }
 //针探使用方法
 
 sys_freebsd();